What is considered a safe range for free chlorine levels in a swimming pool?

The safe range for free chlorine levels in a swimming pool is 1 to 3 parts per million (ppm). This range is optimal for effective disinfection while also ensuring comfort for swimmers. Within this range, free chlorine effectively kills bacteria, viruses, and other harmful microorganisms while maintaining water clarity and safety.

When chlorine levels are maintained within this safe range, it helps to prevent the growth of algae and minimizes the risk of waterborne illnesses. Levels below 1 ppm might not provide sufficient disinfection, leading to potential health risks, while levels above 3 ppm could cause irritation to the skin and eyes of swimmers and may produce a strong chlorine odor. Therefore, keeping free chlorine levels consistently between 1 and 3 ppm is essential for the safe operation of swimming pools.